From the developer: "This software allows you to create professionally looking invoices, quotes, purchase orders and other billing-related documents. The software requires minimal configuration allowing you to print invoices almost immediately after installation. All created invoices can be printed, emailed or faxed to the customer. Invoices are optimized for double-window envelopes. All invoices are stored for further reference. Due dates and unpaid amounts can be monitored. QuickInvoice supports international currencies and different tax systems suitable for US, Canada, Australia and other countries."